| Role | Name | Name (original language) | Name (translation) | Floruits |
|---|---|---|---|---|
| Addressor | Celestine III, pope (d.1198) | 1192 × 1196 | ||
| Addressor | John of Salerno, cardinal-priest of S. Stefano in Monte Celio | 1201 × 1204 | ||
| Addressee | William I, king of Scots (d.1214) | 1145 × 1213 |